Phase 1: 실동작 Enduro/X + PostgreSQL XA 매입 슬라이스

- Enduro/X 7.0.12 소스빌드 이미지(-DENABLE_POSTGRES=ON, libndrxxaecpg XA 스위치)
- docker-compose: postgres(max_prepared_transactions=100) + endurox app
- ECPG XA 서비스 3종: ACQUIRE→RECONCILE→SETTLE (tpservice + EXEC SQL)
- 클라이언트 tpbegin/tpcall체인/tpcommit → tmsrv 2PC(prepare/commit) 원자 커밋
- 검증: 서비스 AVAIL, 커밋 row(status=S) psql 확인, 롤백 시 무잔존, pg_prepared_xacts=0
- 규명된 런타임 요건: sysctl fs.mqueue.*, ulimit msgqueue/nofile, XA open-str JSON
- docs/architecture.md, README, service-catalog 설계

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

slice/acqsv.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <string.h>
+#include <atmi.h>
+#include <ubf.h>
+#include <userlog.h>
+#include "acq.fd.h"
+
+void ACQUIRE(TPSVCINFO *p);   /* forward decl */
+
+/* 서버 프로세스 초기화/종료 콜백 (ATMI 필수) */
+int tpsvrinit(int argc, char **argv)
+{
+    if (tpadvertise("ACQUIRE", ACQUIRE) < 0) {
+        userlog("acqsv: tpadvertise(ACQUIRE) FAIL: %s", tpstrerror(tperrno));
+        return -1;
+    }
+    userlog("acqsv: tpsvrinit - ACQUIRE 서비스 advertise 완료");
+    return 0;
+}
+
+void tpsvrdone(void)
+{
+    userlog("acqsv: tpsvrdone - 종료");
+}
+
+void ACQUIRE(TPSVCINFO *p)
+{
+    UBFH *b = (UBFH *)p->data;
+    long amount = 0, fee, net;
+    char merch[64] = "";
+    BFLDLEN len = sizeof(merch);
+
+    if (Bget(b, T_MERCHANT, 0, merch, &len) < 0) {
+        userlog("ACQUIRE: missing T_MERCHANT: %s", Bstrerror(Berror));
+        tpreturn(TPFAIL, 0, p->data, 0L, 0L);
+        return;
+    }
+    Bget(b, T_AMOUNT, 0, (char *)&amount, 0L);
+
+    fee = amount * 25 / 10000;   /* 0.25% MDR 수수료 */
+    net = amount - fee;
+
+    Bchg(b, T_FEE, 0, (char *)&fee, 0L);
+    Bchg(b, T_NET, 0, (char *)&net, 0L);
+    Bchg(b, T_STATUS, 0, "ACQUIRED", 0L);
+
+    userlog("ACQUIRE merch=%s amount=%ld fee=%ld net=%ld", merch, amount, fee, net);
+    tpreturn(TPSUCCESS, 0, p->data, 0L, 0L);
+}